feat(resources): bundle color themes and compiled xterm-ghostty terminfo

Makes the resources directory self-contained like Ghostty's share/ghostty:
- themes/: the 463 iTerm2-Color-Schemes themes Ghostty 1.3.1 ships
  (release 20260216-151611-fc73ce3), with the upstream MIT license.
- terminfo/: xterm-ghostty compiled with `tic -x` from the terminfo
  source generated by ghostty-termio; `infocmp -x` is identical to the
  installed Ghostty's entry.

The generator script and resources-dir discovery changes follow in a
separate commit.

Test Plan:
- TERMINFO=resources/terminfo infocmp -x xterm-ghostty

resources/themes/Nord

@@ -0,0 +1,22 @@
+palette = 0=#3b4252
+palette = 1=#bf616a
+palette = 2=#a3be8c
+palette = 3=#ebcb8b
+palette = 4=#81a1c1
+palette = 5=#b48ead
+palette = 6=#88c0d0
+palette = 7=#e5e9f0
+palette = 8=#596377
+palette = 9=#bf616a
+palette = 10=#a3be8c
+palette = 11=#ebcb8b
+palette = 12=#81a1c1
+palette = 13=#b48ead
+palette = 14=#8fbcbb
+palette = 15=#eceff4
+background = #2e3440
+foreground = #d8dee9
+cursor-color = #eceff4
+cursor-text = #282828
+selection-background = #eceff4
+selection-foreground = #4c566a